328221365 has 8 divisors (see below), whose sum is σ = 403025568. Its totient is φ = 256470480.

The previous prime is 328221353. The next prime is 328221367. The reversal of 328221365 is 563122823.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-328221365 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328221367) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 763091 + ... + 763520.

It is an arithmetic number, because the mean of its divisors is an integer number (50378196).

Almost surely, 2^328221365 is an apocalyptic number.

It is an amenable number.

328221365 is a deficient number, since it is larger than the sum of its proper divisors (74804203).

328221365 is a wasteful number, since it uses less digits than its factorization.

328221365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1526659.

The product of its digits is 17280, while the sum is 32.

The square root of 328221365 is about 18116.8806641762. The cubic root of 328221365 is about 689.7985584333.

The spelling of 328221365 in words is "three hundred twenty-eight million, two hundred twenty-one thousand, three hundred sixty-five".